#define  _CRT_SECURE_NO_WARNINGS 1

#include <stdio.h>

int My_F(int a)
{
	int i = 0;
	int count = 0;

	for (i = 0; i < 32; i++)
	{
		if ((a >> i & 1) == 1)
		{
			count++;
		}
	}

	return count;
}
int main()
{
	int a = 0;
	
	scanf("%d",&a);

	printf("%d\n",My_F(a));

	return 0;
}